Hate to spoil it but the original holy trinity was not tank, DPS, heal. It was Tank, Heal, Support in EQ as the other 2 spots of DPS were dime a dozen. And an enchanter (minor DPS with party buffs and enemy debuffs and cc) was highly used. Having been a 75 chanter (way back when) I can say it has its potential.

Time Mage might be the closest thing to old Enchanter. Haste, slow and other effects.